Extra luff shape allows the whole sail to rotate better to weather and lets you sail deeper, faster. AIRX 700 is the class standard while AirX 800 is an expensive heavy air cloth. Nylite is a less expensive heavy air cloth.
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.